crackdown

警方对超速行驶展开了严厉打击。

The police have launched a ___crackdown on speeding.

政府宣布对逃税行为进行严厉打击。

The government announced a ___crackdown on tax evasion.

警方正在开始对毒品交易进行打击。

The police are starting a ___crackdown on drug trafficking.